[Springframework-rcp-dev] [Spring-JIRA] Created: (RCP-552) NPE in MessagesDialogExceptionHandler

[Benoit X. (JIRA) <no...@sp...>]

NPE in MessagesDialogExceptionHandler
-------------------------------------

                 Key: RCP-552
                 URL: http://jira.springframework.org/browse/RCP-552
             Project: Spring Framework Rich Client Project
          Issue Type: Bug
          Components: Dialog System
    Affects Versions: 1.0.0
         Environment: JDK5, WinXP
            Reporter: Benoit Xhenseval


Hi

I still get an NPE whenever I use MessagesDialogExceptionHandler.

For some reason, may be due to my xml configuration (??), the method afterPropertiesSet is called before ApplicationServicesLocator.services() is fully setup:

Caused by: java.lang.NullPointerException
        at org.springframework.richclient.exceptionhandling.AbstractDialogExceptionHandler.afterPropertiesSet(AbstractDialogExceptionHandler.java:51)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1390)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1359)

I am using the sample configuration:
    <bean id="exceptionHandler" class="org.springframework.richclient.exceptionhandling.delegation.DelegatingExceptionHandler">
        <property name="delegateList">
            <list>
                <bean class="org.springframework.richclient.exceptionhandling.delegation.SimpleExceptionHandlerDelegate">
                    <property name="throwableClassList">
                        <list>
                            <value type="java.lang.Class">org.acegisecurity.AuthenticationException</value>
                            <value type="java.lang.Class">org.acegisecurity.AccessDeniedException</value>
                        </list>
                    </property>
                    <property name="exceptionHandler">
                        <bean class="org.springframework.richclient.exceptionhandling.MessagesDialogExceptionHandler">
                            <property name="logLevel" value="WARN" />
                            <property name="shutdownPolicy" value="NONE" />
                        </bean>
                    </property>
                </bean>
                <bean class="org.springframework.richclient.exceptionhandling.delegation.SimpleExceptionHandlerDelegate">
                    <property name="throwableClass" value="java.lang.Error" />
                    <property name="exceptionHandler">
                        <bean class="net.objectlab.safemargin.gui.SafeMarginExceptionHandler">
                            <property name="logLevel" value="FATAL" />
                            <property name="shutdownPolicy" value="OBLIGATE" />
                            <property name="issueReporter" ref="issueReporter" />
                        </bean>
                    </property>
                </bean>
                <!-- The order is important: if Throwable would be first then the others would be ignored -->
                <bean class="org.springframework.richclient.exceptionhandling.delegation.SimpleExceptionHandlerDelegate">
                    <property name="throwableClass" value="java.lang.Throwable" />
                    <property name="exceptionHandler">
                        <bean class="net.objectlab.safemargin.gui.SafeMarginExceptionHandler">
                            <property name="logLevel" value="ERROR" />
                            <property name="shutdownPolicy" value="ASK" />
                            <property name="issueReporter" ref="issueReporter" />
                        </bean>
                    </property>
                </bean>
            </list>
        </property>
    </bean>

Any suggestion why this happens immediately at startup?

    <bean id="safemarginLifecycleAdvisor" class="net.objectlab.safemargin.gui.SafeMarginLifecycleAdvisor">
....
        <property name="registerableExceptionHandler" ref="exceptionHandler" />
    </bean>


I will suggest a workaround and a patch that delays the access to ApplicationServicesLocator.services().

Thanks
Benoit.

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